The excerpt from "The Odyssey" that best demonstrates the importance of perseverance in Greek society is Odysseus' perseverance, especially the section that involved his wanderings (Books 9-12). Through his courage, determination and strength, he survived. This might be the most difficult test of his perseverance - well, including his loyalty as Calypso's captive.
I believe the correct answer is the sentence about snow cones. If you would like my reasoning on why the others are incorrect please respond saying so and I will get back to you as quickly as I can. Hope this helps.